Flight number record
AS 205
Alaska Airlines · Kailua-Kona to Seattle
- Route
- KOA → SEA
- Departs
- 13:18
- Flights
- 253
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 205, check with Alaska Airlines.
AS 205 lands a B+, 4 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by roughly 40 minutes on average. That rests on 253 flights, with a median arrival 5 minutes early.
Key figures
On time
81.0%
Arrivals under 15 minutes late, of 252 completed flights
Avg delay
42 min
Across delayed arrivals only, not all flights
Cancelled
0.40%
National rate is 1.89%
1 hour+ late
2.4%
National rate is 8.3%
These figures cover 253 flights between September 2025 and August 2026. The median arrival is 5 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When AS 205 flies
AS 205 flies KOA to SEA without a single fixed slot. Its most common scheduled departure was 13:18, used on 70 of 253 flights, with 11:59 (45 flights) and 12:27 (28 flights) next.
- Departs 13:1870 flights27.7%
- Departs 11:5945 flights17.8%
- Departs 12:2728 flights11.1%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 13:18 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and AS 205 runs 3 points better at 81.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
AS 205 next to KOA to SEA
Every carrier on KOA to SEA combined arrived on time 86.7% of the time across 1,412 flights, so AS 205 is 6 points behind it. Alaska flew 1,047 flights on the same city pair under all its flight numbers, including this one, and those ran 85.8% on time. Across its whole network Alaska Airlines managed 79.7%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 205thin sample | 253 | 81.0% | 42 min | 0.40% | B+ |
| All Alaska Airlines on KOA–SEA | 1,047 | 85.8% | 58 min | 1.91% | A |
| All carriers on KOA–SEA | 1,412 | 86.7% | 56 min | 2.27% | A |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 205 quarter by quarter
Quarter by quarter AS 205 held fairly steady: 81.1% in Jan–Mar 2026, 80.2% in Apr–Jun 2026 and 79.2% in Jul–Sep 2026. A spread of 2 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Oct–Dec 202523 flights—
- Jan–Mar 202690 flights81.1%
- Apr–Jun 202691 flights80.2%
- Jul–Sep 202649 flights79.2%
Scale runs 70% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, AS 205 did best on Wednesday at 85.7% on time and worst on Tuesday at 72.2%. Each day rests on about 36 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 205 runs when it is late
AS 205 often beats the schedule: 81 of 252 completed flights, 32%, arrived 15 minutes or more early. Most of the lateness is short. 28 of the 48 late arrivals were under half an hour behind, and 6 reached an hour or more.
- 15+ min early81 flights32.1%
- Within 15 min123 flights48.8%
- 15–29 min late28 flights11.1%
- 30–59 min late14 flights5.6%
- 1–2 hours late3 flights1.2%
- 2+ hours late3 flights1.2%
Scale runs 0% to 100%.
Share of 252 completed flights by arrival against schedule.
A late pushback is often recovered here: of 50 departures that left 15 minutes late or more, 24 still arrived on time. In the other direction, 22 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SEA.
The worst days
Worst days for AS 205
The latest arrival of the period was on 13 February 2026, 3 hours 55 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 February 2026 | 3 hours 55 minutes | Late-arriving aircraft |
| 28 January 2026 | 3 hours 3 minutes | Late-arriving aircraft |
| 22 March 2026 | 2 hours 34 minutes | Late-arriving aircraft |
| 24 March 2026 | 1 hour 9 minutes | Late-arriving aircraft |
| 16 August 2026 | 1 hour 6 minutes | Late-arriving aircraft |
Delay causes
Why AS 205 runs late
Late-arriving aircraft accounts for 49% of the 1,994 delay minutes carriers reported here, and the remaining four split what is left.
- 49%Late-arriving aircraft
- 28%National Airspace System
- 22%Carrier
- 1%Extreme weather
49% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 1,994 reported delay minutes here, that single category outweighs weather by 38 to one. The split is drawn from 1,994 delay minutes reported on AS 205.
Cancellations are rare at 0.40%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.4% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 2,688 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The same number turns up on three other city pairs in the data, including KOA to SAN (42), SEA to JNU (33) and SEA to ANC (13), but none flew often enough under AS 205 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to KOA to SEA only.
One caution: this is a thin sample. 253 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking AS 205
For a booking, AS 205 is one of the weaker ways to fly KOA to SEA: 6 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- KOA to SEA, every carrier and departure
- SEA to KOA, the return direction
- Delta Air Lines 485 on the same route91.1%
- Seattle-Tacoma International (SEA) delay statistics
- Alaska Airlines on-time record
- Every Alaska Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means Alaska Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.